GetOptionKit\ValueType\EmailType::test PHP Method

    public function test($value)
    {
        return filter_var($value, FILTER_VALIDATE_EMAIL) !== false;
    }

 public function testEmailType()
 {
     $email = new EmailType();
     ok($email->test('*****@*****.**'));
     $this->assertFalse($email->test('test@test'));
 }